Almost 100% of the data falls within 3 standard deviations of the mean. There are differences in sampling, even without bias. But if our sample falls far right or left on this graph, we would be surprised and probably want to check our results

step-by-step explanation: i dont

the circumference of a circle is, 10.676 cm.

step-by-step explanation:

the formula for circumference of a circle is given by:

where

c is the circumference of a circle and

d is the diameter of a circle.

given: diameter(d) = 3.4 cm and use

substitute these values in [1] we get;

cm

therefore, the circumference of a circle is, 10.676 cm